Paper box.



No. 715.7%. Patemd nu. I6, |902.

w. G. HAAs.

PAPER BOX.

(Application filed Dec. 10, 1901.)

(Ilo Model.)

' b Z? 75" Smm m: Naam panas cn., wcmuwo., wAsHmawN, n. n.

vlocking position.

UNITED STATES PATENT OFFICE.

WALTER G. HAAS, OF DAYTON, OHIO.

PAPER BOX.

SPECIFICATION forming part of Letters Patent No. 715,789, dated December 16, 1902.

Application led December 10, 1901. Serial No. 85,363. (No model.)

To all whom it may concern.'

Be it known that LWALTER G. HAAS, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Paper Boxes, of which the following is a speciication.

The object of my invention is to provide a paper packing-box the body of which is formed of a sheet orsheets cut in form so that the bottom is formed of overlapping and interlocking liaps. By this means a securelybraced and efficient side is formed which is easily, cheaply, and quickly made.

The features of myinvention are more fully set forth in the description of the accompanying drawings, forming a part of this specification, in which* Figure 1 is aplan view of a modified blank. Fig. 2 is a top plan View of the box of the form shown in Fig. 1, showing the apsinterlocked in position. Fig. 3 is a plan view of a blank for an unequal-sided box. Fig. 4 is a top plan view of the box of the form shown in Fig. 3, showing the flaps in folded inter- Fig. 5 is a plan view of a blank for a triangular box. Fig. 6 is a top plan View of the box of the form shown in Fig. 5, showing the flaps interlocked in position.

A A represent two blanks of an ordinary rectangular box cut from a sheet of cardboard or cut from a continuous sheet of cardboard, for in making large-sized boxes it is sometimes desirable to paste a number of sheets together.

a c a2 a3 represent the sides.

a4 represents the pasting-iiap for securing the body of the box together.

h h' h2 b3 represent the liaps, which are bent inwardly, either before or after the body of the box has been pasted together, to form the bottom of the box. These flaps being on the inside of the box are closed down in the following manner: The bottom or side is closed by pressing these four overlapping Aflaps downward simultaneously. As they reach the plane at right angles to the sides their central edges abut each other, lock, and arrest the further outward movement of the flaps and hold the same in thedesired plane of the box. In the preferred form the outer marginal edges of these flaps are of the length of the sides of the box, against which these edges abut, and the central point of said iiaps abut the central point of each of the other flaps, so that all the flaps have a common point of intersection. They thus brace against each other, and their outer marginal edges abut and brace against the sides of the box, thus forming a bottom'of two thicknesses of paper, the

free end portions of said iiaps being upon the inner side and the inner ends of the flaps, which are integral with the sides, being upon the outside. It is obvious that any polygonalsided boxes maybe thus formed where the top or bottom' of such box is at right angles to the plane of the sides. Itis obvious that both the top and bottom could be formed of overlapping flaps; but it is more convenient in most cases to use a removable lid. Each flap forms a projection or prolongation of its respective subdivision and is provided on its edge with an interlocking notch, shoulder, or indentation, which may be just sufficiently deep to exert a retaining tendency upon the adjacent edges of its neighboring flaps. When these flaps or prolongations are bent downwardly from the sides of the box in their proper relative positions, the notched edges of the iiaps mutually intersect, so that in the act of crowding the flaps down to the bottom position the notched edges of the flaps mutually interlock serially-that is, each notched edge interlocks with its oppositely-adjacent edges-and thus there is a serial interlocking of the edges of the iiap around the sides of the box, which makesa mutual lock common to all of the said iiaps or prolongations.

Fig. 3 shows a blank for a box of a trapezoid form. O represents the blank; c c c2 c3, the sides; c4, the pasting-flap; d d d2 cl3, the interlocking iiaps forming the bottom or cover.

It is not essential that the interlocking marginal edge of the iiaps be in right lines. In someinstances an overlapping hook portion is desirable, and this form is shown in Fig. 3. s represents the locking or engaging points of the flaps, which in this instance are not equidistant to the corners of the box. The overlapping portions are shown in full lines, Fig. 4, and the other portion of the iiaps is shown in dotted lines.

Fig. 1 shows a blank for a rectangular box IOO having the inner marginal lines of the iaps hook-shaped at the center, so as to form a fastening-lock for the iiaps when bent into the position shown in Fig. 2. This hook form of iiaps is preferable in many instances, as it holds the iiaps more firmly in position, because the flaps interlock against strains applied to the sides of the bottom.

Fig. 5 is a blank for a triangular-shaped box. E represents the blank. e c' e2 represent the sides; e3, the pasting-flap. h 71.' h2 represent the interlocking flaps.

Fig. 6 is a plan view of the inside face of the bottom of the completed box, showing the flaps in their interlocked position, the overlapping portions being shown in full line and the base portion of the fiaps in dotted lines.

It will be obvious that various forms of polygonal boxes may be made as the Wants or fancy of the trade may desire. A box-body formed of the blanks herein shown and described possesses man31 advantages. First, it is` quickly and easily made; second, the fold-over fiaps which form the bottom or side interlock, overlap, brace, and support each other and assisted in this function by the fact that each iiap is formed integral with one of the sides and is of the same dimension as the side at its base, thus forming the edge of such side and being much stronger, more durable than knockdown boxes of the ordinary form of construction, and especially stronger than boxes Where the sides are secured by tongues and slots.

In the forms herein shown the locking of the sections is formed by the abutting engagement of the marginal edges almost completely obviating any liability of tearing, thereby being much more durable as Well as stronger and being more secure in holding the packed article for shipping and handling.

In any polygonal-sided box each flap is folded down between its two adjacent flaps upon each side, so that each ap folds upon its adjacent ap. Thus each iap forms a triangular-shaped section one edge of which is integral with the body of the box, the second edge of which iiap lies snugly against the next adjacent body side, and the third boxes by simultaneously folding down the overlapping iiaps.

Each of the bottom iiaps b b b2 b3 is provided with an abrupt shoulder n. When these bottom fiaps are folded outwardly from the interior of the box, as described, these shoulders n mutually interlock. The interlacing of the aps forms a lock against the outward movement of the bottom, and the interlocking shoulders form a central brace common to all the flaps, which serves to hold the bottom iaps compactly together against strains applied either in the direction in Which the Iiaps are folded or transversely thereto. The result is a locked joint for the entire bottom, effectually holding the same in place. The spreading of the box by inserting contents in it simply serves to make this lock stronger by increasing the leverage.

Having described my invention, I claim- A box or receptacle comprising in its construction an oblong body-section suitably divided into a plurality of subsections, said body-section being suitably folded and secured to constitute the walls of the box, and a notched flap upon the end of each subsection, said Hap being constructed and arranged to be crowded down from the inside toward the bottom of thebox to thereby form in the act of crowding down the same a mutual serial interlock between all of the said flaps.

In testimony whereof I have hereunto set my hand.

WALTER G. HAAS.

Witnesses:

OLIVER B. KAISER, EDWD. T. ALEXANDER. 

